In addition to the returning Season 1 actors -- there could also be more familiar faces popping up that have yet to be announced -- Maroon 5 frontman and "The Voice" coach Adam Levine has joined the cast of the FX series for Season 2.

"It's going to be fun and I told him I didn't really know what I was doing, but he didn’t seem to care," Levine told Ryan Seacrest in early April 2012. "So, I'm going to go and just try to be acting. I think I'm going to be playing myself, so hopefully it will be easy."